Anionic acid dyes, processes for their preperation and their use

ABSTRACT

Anionic acid dyes of the formula    &lt;IMAGE&gt;  (1)  in which R1 and R2 independently of one another are hydrogen or substituted or unsubstituted C1-C4alkyl, X1 is C1-C8alkyl, substituted or unsubstituted C5-C7cycloalkyl, phenyl or naphthyl which are unsubstituted or substituted by C1-C4alkyl, C1-C4alkoxy, C2-C4alkanoylamino, amino, hydroxyl, ureido, halogen, carboxyl or sulfo, or the radical of the formula -N(R2)-X1 is a ring, which may contain further heteroatoms, Y1 is a radical of the formula  )   in which B1 is a colourless organic bridge member, R3 is hydrogen or C1-C4alkyl and R4 is hydrogen or substituted or unsubstituted C1-C4alkyl, W1 is hydrogen or a radical of the formula -CO-R, in which R is substituted or unsubstituted C1-C8alkyl, C5-C7cycloalkyl, phenyl or naphthyl and A1 is as defined in claim 1. The dyes of the formula (1) are particularly suitable for dyeing or printing natural or synthetic polyamide fibre materials.

The present invention relates to novel anionic acid dyes, to processes for their preparation and to use of these dyes for dyeing and printing fibre materials, in particular textile fibre materials.

The present invention relates to anionic acid dyes of the formula ##STR3## in which R₁ and R₂ independently of one another are hydrogen or substituted or unsubstituted C₁ -C₄ alkyl,

X₁ is C₁ -C₈ alkyl, substituted or unsubstituted C₅ -C₇ cycloalkyl, phenyl or naphthyl which are unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, amino, hydroxyl, ureido, halogen, carboxyl or sulfo,

or the radical of the formula --N(R₂)--X₁ is a ring, which may contain further heteroatoms,

Y₁ is a radical of the formula ##STR4## in which B₁ is a colourless organic bridge member,

R₃ is hydrogen or C₁ -C₄ alkyl and R₄ is hydrogen or substituted or unsubstituted C₁ -C₄ alkyl,

W₁ is hydrogen or a radical of the formula --CO--R, in which

R is substituted or unsubstituted C₁ -C₈ alkyl, C₅ -C₇ cycloalkyl, phenyl or naphthyl and

A₁ is the radical of a monoazo dye of the formula ##STR5## in which K₁ is a radical of the benzene or naphthalene series or a heterocyclic radical and (R₅)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl and sulfo, or A₁ is the radical of a polyazo, metal complex azo, anthraquinone, formazan, phthalocyanine or dioxazine dye.

C₁ -C₄ alkyl R₁, R₂ and R₄ independently of one another are suitably, for example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl or isobutyl. The alkyl radicals mentioned can be unsubstituted or substituted, for example by hydroxyl, sulfo, sulfato, cyano or carboxyl. Preferred alkyl radicals are the corresponding unsubstituted radicals.

C₁ -C₄ alkyl R₃ and R₅ is suitably, for example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl or isobutyl.

C₁ -C₈ alkyl X₁ and R independently of one another are suitably preferably C₁ -C₄ alkyl radicals, for example methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl or isobutyl. The alkyl radicals R mentioned can be unsubstituted or substituted, for example by hydroxyl, sulfo, sulfato, cyano or carboxyl. The unsubstituted radicals R are preferred here.

C₁ -C₄ alkoxy R₅ is suitably, for example, methoxy, ethoxy, propoxy, isopropoxy, butoxy or isobutoxy, in particular methoxy.

C₂ -C₄ alkanoylamino R₅ is suitably, in particular, acetylamino or propionylamino, preferably acetylamino.

Halogen R₅ is suitably, for example, fluorine, chlorine or bromine, in particular chlorine.

A ring which may contain further heteroatoms for the radical of the formula --N(R₂)--X₁ is suitably, for example, morpholino.

C₅ -C₇ cycloalkyl X₁ and R is suitably, in particular, the cyclohexyl radical. The cycloalkyl radicals mentioned can be unsubstituted or substituted, for example by C₁ -C₄ alkyl, in particular by methyl.

Phenyl or naphthyl R are suitably, in addition to the corresponding unsubstituted radicals, the radicals substituted, for example, by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, amino, hydroxyl, ureido, halogen, carboxyl or sulfo.

A colourless organic bridge member B₁ is, for example, substituted or unsubstituted C₁ -C₁₂ alkylene, which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and --O--, or substituted or unsubstituted C₅ -C₇ Cycloalkylene, phenylene or naphthylene. C₅ -C₇ cycloalkylene here is suitably, in particular, cyclohexylene, which can be unsubstituted or substituted, for example by C₁ -C₄ alkyl, in particular by methyl. Substituents here of the phenylene and naphthylene radicals mentioned are suitably, for example, C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, amino, hydroxyl, ureido, halogen, carboxyl or sulfo, in particular C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen or sulfo. Substituents of the C₁ -C₁₂ alkylene radicals mentioned are suitably, for example, hydroxyl, sulfo, sulfato, cyano or carboxyl. The C₁ -C₁₂ -alkylene radicals are preferably unsubstituted.

R₁ and R₂ are preferably independently of one another hydrogen or C₁ -C₄ alkyl. R₁ is particularly preferably hydrogen, methyl or ethyl, in particular hydrogen. R₂ is particularly preferably C₁ -C₄ alkyl, in particular methyl or ethyl, and preferably ethyl.

(R₅)₀₋₃ is preferably 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen and sulfo. The radicals of the formula (3) preferably contain only one substituent R₅, which is hydrogen or sulfo, in particular sulfo.

X₁ is preferably C₁ -C₈ alkyl, C₅ -C₇ -cycloalkyl which is unsubstituted or substituted by C₁ -C₄ alkyl, or phenyl or naphthyl which are unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl or sulfo. The phenyl radical, which can be substituted as defined above, is particularly preferred here. X₁ is particularly preferably phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen or sulfo, preferably unsubstituted phenyl. R₂ here is particularly preferably C₁ -C₄ alkyl, in particular methyl or ethyl and preferably ethyl.

B₁ is preferably a C₁ -C₁₂ alkylene radical, in particular a C₁ -C₁₀ alkylene radical, which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and, in particular, --O--, and is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl. The corresponding unsubstituted alkylene radicals are of particular interest here.

B₁ is particularly preferably a C₁ -C₁₀ alkylene radical, in particular a C₁ -C₆ alkylene radical, and preferably a C₁ -C₄ alkylene radical. Particularly interesting radicals B₁ are those of the formulae --CH₂ --, --CH₂ CH₂ -- and --CH₂ CH₂ CH₂ --.

R₃ is preferably hydrogen.

R₄ is preferably hydrogen or C₁ -C₄ alkyl which is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl, preferably hydrogen or C₁ -C₄ alkyl, and in particular hydrogen.

R is preferably phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo, or in particular C₁ -C₈ alkyl. R is particularly preferably C₁ -C₄ alkyl, in particular methyl or ethyl, and preferably methyl.

W₁ is preferably hydrogen or a radical of the formula --CO--R, in which R is as defined and preferred above. In particular, R here is C₁ -C₈ alkyl, or phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo, preferably C₁ -C₈ alkyl. W₁ is particularly preferably hydrogen.

The radical Y₁ is preferably a radical of the formula (2a), or (2b), in particular a radical of the formula (2a).

Preferred dyes of the formula (1) are those in which

R₁ and R₄ independently of one another are hydrogen or C₁ -C₄ alkyl,

R₂ is hydrogen or C₁ -C₄ alkyl, in particular C₁ -C₄ alkyl,

X₁ is phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl or sulfo, preferably phenyl,

B₁ is a C₁ -C₁₀ alkylene radical, which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and --O-- and is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl and

W₁ is hydrogen or a radical of the formula --CO--R, in particular hydrogen.

The radical of the formula (3) is preferably a radical of the formula ##STR6## in which K₁ and (R₅)₀₋₃ are as defined and preferred above.

The radical K₁ is preferably a benzene, naphthalene, 6-hydroxypyrid-2-one, 1-phenyl-5-aminopyrazole, 1-phenylpyrazol-5-one or indole radical, in particular a benzene, naphthalene, 1-phenyl-5-aminopyrazole or 1-phenylpyrazol-5-one radical, and preferably a naphthalene, 1-phenyl-5-aminopyrazole or 1-phenylpyrazol-5-one radical.

Examples of substituents of the radical K₁ are the following:

C₁ -C₈ alkyl, in particular C₁ -C₄ alkyl, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or tert-butyl; C₁ -C₈ alkoxy, in particular C₁ -C₄ alkoxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy or tert-butoxy; C₂ -C₆ -alkanoylamino, in particular C₂ -C₄ -alkanoylamino, for example propionylamino or, in particular, acetylamino; halogen, for example fluorine or, in particular, chlorine; hydroxyl; cyano; carbamoyl; carboxyl; sulfo; phenyl; amino and N-mono- or N,N-di-C₁ -C₄ alkylamino. In this case, the phenyl radicals mentioned can be unsubstituted or substituted, for example by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ -alkanoylamino, ureido, halogen, carboxyl or sulfo.

Particularly preferably, K₁ is a radical of the formula ##STR7## in which R₆ is methyl or carboxyl, R₇ is amino or hydroxyl and

(R₈)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl and sulfo, or

K₁ is a radical of the formula ##STR8## in which R₉ is hydrogen, amino or N-mono- or N,N-di-C₁ -C₄ alkylamino and

R₁₀ is hydrogen or hydroxyl.

R₆ is preferably methyl.

(R₈)₀₋₃ is preferably 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen and sulfo.

R₉ is preferably amino or N-mono- or N,N-di-C₁ -C₄ alkylamino, in particular amino.

R₁₀ is preferably hydrogen.

The radicals of the formula (6) preferably contain only one sulfo group.

Preferred radicals K₁ of the formula (6) are those of the formula ##STR9## in which R₁₀ is hydrogen or hydroxyl, in particular hydrogen.

The radical A₁ in the dye of the formula (1), as a radical of a polyazo, metal complex azo, anthraquinone, formazan, phthalocyanine or dioxazine dye, can contain the substituents customary in organic dyes bonded to its basic structure.

Examples of substituents in the radical A₁ are: alkyl groups having 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl or butyl, it being possible for the alkyl radicals to be further substituted, for example by hydroxyl, sulfo or sulfato; alkoxy groups having 1 to 4 carbon atoms, such as methoxy, ethoxy, propoxy, isopropoxy or butoxy, it being possible for the alkyl radical to be further substituted, for example by hydroxyl, sulfo or sulfato; phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo; acylamino groups having 1 to 8 carbon atoms, in particular such alkanoylamino groups, for example acetylamino or propionylamino; benzoylamino which is unsubstituted or substituted in the phenyl ring by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen or sulfo; phenylamino which is unsubstituted or substituted in the phenyl ring by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen or sulfo; N,N-di-β-hydroxyethylamino; N,N-di-β-sulfatoethylamino; alkylsulfonyl having 1 to 4 carbon atoms, such as methylsulfonyl or ethylsulfonyl; trifluoromethyl; nitro; amino; cyano; halogen, such as fluorine, chlorine or bromine; carbamoyl; sulfamoyl; N-mono- or N,N-dialkylsulfamoyl having in each case 1 to 4 carbon atoms; N-phenylsulfamoyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo; ureido; hydroxyl; carboxyl; sulfomethyl or sulfo.

A₁ as a radical of a polyazo dye is suitably, in particular, a radical of a disazo dye, preferably a radical of the formula ##STR10## in which D is a radical of the benzene or naphthalene series, M is the radical of a central component of the benzene or naphthalene series and

K₂ is a radical of the benzene or naphthalene series or a heterocyclic radical.

The radical K₂ here is as defined and preferred above for K₁.

Examples of substituents of the radicals D and M are the following:

C₁ -C₈ alkyl, in particular C₁ -C₄ alkyl, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or tert-butyl; C₁ -C₈ alkoxy, in particular C₁ -C₄ alkoxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy or tert-butoxy; C₂ -C₆ alkanoylamino, in particular C₂ -C₄ alkanoylamino, for example propionylamino or, in particular, acetylamino; halogen, for example fluorine or, in particular, chlorine; hydroxyl; cyano; carbamoyl; carboxyl; sulfo; phenyl; amino and N-mono- or N,N-di-C₁ -C₄ alkylamino. In this case, the phenyl radicals mentioned can be unsubstituted or substituted, for example by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl or sulfo.

Preferred substituents of the radicals D and M are C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, cyano, carbarnoyl, carboxyl, sulfo, amino or N-mono- or N,N-di-C₁ -C₄ alkylamino. Particularly preferred substituents of the radicals D and M are C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, sulfo, amino or N-mono- or N,N-di-C₁ -C₄ alkylamino.

Particularly preferred radicals A₁ of a disazo dye are radicals of the formula ##STR11## in which K₂ is as defined and preferred above and

(R₁₁)₀₋₃ and (R₁₂)₀₋₃ independently of one another are 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy,

C₂ -C₄ alkanoylamino, halogen, hydroxyl, cyano, carbamoyl, carboxyl, sulfo, amino and N-mono- or N,N-di-C₁ -C₄ alkylamino. (R₁₁)₀₋₃ and (R₁₂)₀₋₃ preferably independently of one another are 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, sulfo, amino and N-mono- or N,N-di-C₁ -C₄ alkylamino. (R₁₁)₀₋₃ and (R₁₂)₀₋₃ especially preferably independently of one another are 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, sulfo and amino.

Especially preferred radicals A₁ of a disazo dye are radicals of the formula ##STR12## in which K₂, (R₁₁)₀₋₃ and (R₁₂)₀₋₃ are as defined and preferred above.

A₁ as a radical of an anthraquinone dye is suitably, in particular, a radical of the formula ##STR13## in which G is a phenylene radical which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo, or a cyclohexylene, phenylenemethylene or C₂ -C₆ alkylene radical.

G is preferably a phenylene radical which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo, in particular by C₁ -C₄ alkyl or sulfo.

Particularly important radicals A₁ of an anthraquinone dye are those of the formula ##STR14## in which (R₁₃)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl and sulfo. R₁₃ here is particularly preferably C₁ -C₄ alkyl, in particular methyl. The radical of the formula (12) preferably contains two sulfo groups.

The radical A₁ is preferably a radical of the formula (3) or the radical of a disazo or anthraquinone dye, these radicals mentioned being as defined and preferred above.

Preferred dyes of the formula (1) are those in which A₁ is a radical of the formula (3), (9) or (11). K₁ and K₂ here are preferably radicals of the formula (5) or (6), in particular radicals of the formula (5) or (7). The radicals R₁, R₂, X₁ and Y₁ here are as defined and preferred above.

Particularly preferred dyes of the formula (1) are those in which A₁ is a radical of the formula (4), (9) or (11). K₁ and K₂ here are preferably radicals of the formula (5) or (6), in particular radicals of the formula (5) or (7). The radicals R₁, R₂, X₁ and Y₁ here are as defined and preferred above.

Especially preferred dyes of the formula (1) are those in which A₁ is a radical of the formula (4), (10) or (12). K₁ and K₂ here are preferably radicals of the formula (5) or (6), in particular radicals of the formula (5) or (7). The radicals R₁, R₂, X₁ and Y₁ here are as defined and preferred above.

The present invention furthermore relates to a process for the preparation of the dyes of the formula (1), which comprises reacting a cyanuric halide, in particular cyanuric fluoride, or, preferably, cyanuric chloride, with a compound of the formula

    A.sub.1 --NHR.sub.1                                        ( 13),

a compound of the formula

    X.sub.1 --NHR.sub.2                                        ( 14)

and a compound of the formula

    Y.sub.1 --H                                                (15)

and, if desired, subsequently carrying out a conversion reaction, in which A₁, X₁, Y₁, R₁ and R₂ are as defined under formula (1).

Preferably, the cyanuric halide is first reacted with approximately stoichiometric amounts of a compound of the formula (13) at a temperature of -5° to 20° C., preferably 0° to 5° C., the pH being kept neutral to acid, preferably at 2 to 7, in particular 2 to 4, by addition of suitable bases, for example alkali metal bases, such as lithium hydroxide or carbonate, sodium hydroxide or carbonate or potassium hydroxide or carbonate. Approximately stoichiometric amounts of a compound of the formula (14) are advantageously added to the resulting reaction mixture, and this compound is reacted with the triazine derivative at slightly elevated temperature, preferably at 10° to 60° C., in particular 15° to 30° C., and at a neutral to slightly acid pH, which is preferably 6 to 7.

Another possibility comprises first reacting the cyanuric halide with an intermediate of the compound of the formula (13), for example a diazo component in the case of azo dye radicals, and then reacting the product to give the corresponding dye radical A₁, for example by diazotization and coupling. This reaction to give a dye radical can be carried out, for example, preferably directly after the reaction of the cyanuric halide with the intermediate, or also during the subsequent course of the synthesis of the dye of the formula (1).

The triazinyl compounds obtainable by the processes described above still contain a halogen atom, which can be converted into a group Y₁ by reaction with a compound of the formula (15) at elevated temperature, preferably 20° to 70° C., and at a neutral to slightly alkaline pH, which is, for example, 7 to 9, depending on the compound of the formula (15) employed. An excess of the compound of the formula (15) is advantageously employed.

A conversion reaction is suitably, in particular, an acylation reaction, in which a radical W₁ of the formula --CO--R is introduced.

The procedure here is as described above, using a compound of the formula (15) in which W₁ is hydrogen. The resulting reaction product is then reacted with a compound of the formula

    Hal--CO--R                                                 (16)

in which Hal is halogen, in particular bromine or chlorine, and

R is as defined above.

Acetic anhydride is preferably used for introduction of a radical of the formula --CO--R is which R is methyl.

The reaction with compounds of the formula (16) defined above can generally be carried out in dipolar aprotic solvents, for example dimethylformamide, dimethyl sulfoxide or N-methylpyrrolidone, in the presence of a base, for example an alkali metal carbonate or alkali metal hydroxide, for example sodium carbonate, potassium carbonate or sodium hydroxide, at a temperature of, for example, 30° to 80° C.

The reaction with acetic anhydride is as a rule carried cut in an aqueous medium in the presence of a base, for example an alkali metal carbonate or alkali metal hydroxide, for example sodium carbonate, potassium carbonate or sodium hydroxide, at a temperature of, for example, 20° to 60° C., in particular 30° to 50° C., and a pH of, for example, 4 to 7, in particular 5 to 6.

The compounds employed in the above processes are known or can be obtained analogously to known compounds.

The dyes of the formula (1) are present either in the form of their free acid or, preferably, as salts thereof.

Suitable salts are, for example, the alkali metal, alkaline earth metal or ammonium salts or the salts of an organic amine. Examples are the sodium, lithium, potassium or ammonium salts or the salt of mono-, di- or triethanolamine.

The term sulfo generally includes the free acid form (--SO₃ H) and also the salt form.

The dyes of the formula (1) are anionic acid dyes. In the dyes of the formula (1), the number of anionic groups, in particular the numer of sulfo groups, is greater than or equal to the number of cationic groups. Preferably, the numner of anionic groups is greater than the number of cationic groups. Cationic groups are to be understood as meaning those which carry a cationic charge under the customary dyeing conditions. Examples are aliphatically bonded amino radicals. The nitrogen atoms present in the triazine ring and those bonded to the triazine radical carry no cationic charge. The total number of sulfo and sulfato groups of the dyes of the formula (1) is preferably greater than one. The total number of sulfo and sulfato groups of the dyes of the formula (1) is preferably two to four, in particular two or three, and preferably two.

The dyes of the formula (1) according to the invention are suitable, by methods known per se, for dyeing and printing, in particular fibre materials containing nitrogen or containing hydroxyl groups, for example textile fibre materials of cellulose, silk and, in particular, wool and synthetic polyamides. Dyeing or printing of natural or synthetic polyamide fibre materials is preferred. The dyes of the formula (1) according to the invention can be used for dyeing and printing in the generally customary form, which is worked up beforehand, if appropriate. Level dyeings with good allround fastness properties, in particular good fastness to rubbing, wet processing, wet rubbing and light. The dyes according to the invention are furthermore readily water-soluble and can easily be combined with other dyes. The dyes according to the invention in which W₁ is hydrogen are furthermore particularly suitable for dyeing in the presence of colourless fixing agents which contain sulfo or sulfato groups and contain at least two fibre-reactive groups. Dyeings with improved wet fastness properties are obtained here, the dyeings likewise having a very good levelness. The abovementioned textile material can be in the most diverse forms of processing, for example as fibre, yarn, woven fabric or knitted fabric.

The following examples serve to illustrate the invention. The temperatures are stated in degrees Celsius, parts are parts by weight and the percentage data are based on percentages by weight, unless noted otherwise. Parts by weight bear the same relation to parts by volume as the kilogramme to the litre.

EXAMPLE 1

19.1 parts of 1,3-phenylenediamine-4-sulfonic acid (98.6%) are dissolved in 100 parts of water and 52 parts of an aqueous, 2 normal sodium hydroxide solution at a pH of 7, and the mixture is added dropwise to a mixture comprising 18.5 parts of cyanuric chloride, 100 parts of ice and 50 parts of water at a temperature of 5° C. in the course of 50 minutes. During this dropwise addition, the pH is kept at a value of 3 to 3.5. The pH is then increased to 7 in the course of 70 minutes with 50 parts of an aqueous 2 normal sodium hydroxide solution. After one hour, 25 parts of hydrochloric acid (37%) and 200 parts of water are added, and 25 parts of an aqueous 4 molar sodium nitrite solution are metered in at a temperature of 5 to 15° C. in the course of 25 minutes. After two hours, the excess sodium nitrite is destroyed with sulfamic acid. During this procedure, 22.5 parts of 2-naphthylamine-5-sulfonic acid are dissolved in 100 parts of water and 52 parts of an aqueous 2 normal sodium hydroxide solution at a pH of 7 and the solution is added dropwise to the reaction mixture in the course of 30 minutes. Thereafter, the pH is brought to a value of 7 in the course of 80 minutes by means of 112 parts of an aqueous 2 normal sodium hydroxide solution. A solution of 12.2 parts of N-ethylaniline in 100 parts of 1 molar hydrochloric acid is then added dropwise in the course of 15 minutes, followed by the addition of 101 parts of an aqueous 2 normal sodium hydroxide solution in the course of 50 minutes. 500 parts of an aqueous sodium chloride solution are added to the dark red reaction solution and the product which has precipitated out is filtered off, washed with 10% aqueous sodium chloride solution and dried in vacuo at a temperature of 70° C. 52.5 parts of an intermediate compound of the formula ##STR15## are obtained.

10 parts of the intermediate of the formula (101) are dissolved in 200 parts of water and the solution is added dropwise to a solution of 14 parts of 3-methylaminopropylamine in 14 parts of water at a temperature of 40° C. in the course of 4 hours. The mixture is subsequently stirred at a temperature of 40° C. for one hour and 25 parts of hydrochloric acid are then added. The product which has precipitated out is filtered off and washed with water. The moist material on the suction filter is introduced into 300 parts of water at a temperature of 70° C. and neutralized with 10 parts of an aqueous 1 normal sodium hydroxide solution. The product is salted out with 30 parts of sodium chloride, filtered off at a temperature of 40° C. and dried in vacuo at a temperature of 50° C. 8.8 parts of a dye which, in the form of the free acid, is the compound of the formula ##STR16## are obtained. The resulting dye of the formula (102) dyes wool and synthetic polyamide fibre material in orange colour shades.

EXAMPLES 2 TO 25

The dyes shown in the form of the free acids in the following Table 1, which dye wool and synthetic polyamide fibre material in the colour shades shown in column 3, can be obtained in a manner analogous to the instructions in Example 1.

                                      TABLE 1     __________________________________________________________________________                                                     Colour shade on wool     Example          Dye                                        and polyamide     __________________________________________________________________________           ##STR17##                              (103)                                                     yellow     3           ##STR18##                              (104)                                                     yellow     4           ##STR19##                              (105)                                                     yellow     5           ##STR20##                              (106)                                                     yellow     6           ##STR21##                              (107)                                                     yellow     7           ##STR22##                              (108)                                                     yellow     8           ##STR23##                              (109)                                                     orange     9           ##STR24##                              (110)                                                     orange     10           ##STR25##                              (111)                                                     red     11           ##STR26##                              (112)                                                     orange     12           ##STR27##                              (113)                                                     red     13           ##STR28##                              (114)                                                     red     14           ##STR29##                              (115)                                                     red     15           ##STR30##                              (116)                                                     red     16           ##STR31##                              (117)                                                     red     17           ##STR32##                              (118)                                                     red     18           ##STR33##                              (119)                                                     red     19           ##STR34##                              (120)                                                     blue     20           ##STR35##                              (121)                                                     blue     21           ##STR36##                              (122)                                                     blue     22           ##STR37##                              (123)                                                     blue     23           ##STR38##                              (124)                                                     blue     24           ##STR39##                              (125)                                                     blue     25           ##STR40##                              (126)                                                     blue     __________________________________________________________________________

EXAMPLES 26

6.5 Parts of the dye of the formula ##STR41## are dissolved in 100 parts of water and 10 parts of dioxane at a temperature of 35° to 40° C. and a pH of 6, the pH being established by means of hydrochloric acid (37%). 6 parts of acetic anhydride are added dropwise in the course of 30 minutes, the pH being kept at a value between 5 and 6 by means of 1 molar aqueous sodium carbonate solution. The reaction solution is evaporated and the residue is dried in vacuo at a temperature of 70° C. A dye which, in the form of the free acid, is the compound of the formula ##STR42##

is obtained. The dye of the formula (127) dyes wool and synthetic polyamide fibre material in orange colour shades.

EXAMPLES 27 TO 50

The dyes shown in the form of the free acids in the following Table 2, which dye wool and synthetic polyamide fibre material in the colour shades shown in column 3, can be obtained in an analogous manner to the instructions in Example 26.

                                      TABLE 2     __________________________________________________________________________                                                        Colour shade on wool     Example          Dye                                           and polyamide     __________________________________________________________________________     27           ##STR43##                                 (128)                                                        yellow     28           ##STR44##                                 (129)                                                        yellow     29           ##STR45##                                 (130)                                                        yellow     30           ##STR46##                                 (131)                                                        yellow     31           ##STR47##                                 (132)                                                        yellow     32           ##STR48##                                 (133)                                                        yellow     33           ##STR49##                                 (134)                                                        orange     34           ##STR50##                                 (135)                                                        orange     35           ##STR51##                                 (136)                                                        red     36           ##STR52##                                 (137)                                                        orange     37           ##STR53##                                 (138)                                                        red     38           ##STR54##                                 (139)                                                        red     39           ##STR55##                                 (140)                                                        red     40           ##STR56##                                 (141)                                                        red     41           ##STR57##                                 (142)                                                        red     42           ##STR58##                                 (143)                                                        red     43           ##STR59##                                 (144)                                                        red     44           ##STR60##                                 (145)                                                        blue     45           ##STR61##                                 (146)                                                        blue     46           ##STR62##                                 (147)                                                        blue     47           ##STR63##                                 (148)                                                        blue     48           ##STR64##                                 (149)                                                        blue     49           ##STR65##                                 (150)                                                        blue     50           ##STR66##                                 (151)                                                        blue     __________________________________________________________________________

Dyeing Example 1

100 Parts of a woollen fabric are pretreated for 5 minutes at a temperature of 30° C. and a pH of 4.5 in an aqueous bath which comprises 2000 parts of water, 5 parts of sodium sulfate, 2 parts of sodium acetate and 2 parts of 80% acetic acid. After addition of an aqueous solution comprising 0.9 part of the dye of the formula (102), the dye liquor is kept at a temperature of 30° C. for a further 5 minutes and then heated to a temperature of 100° C. at a heating-up rate of 1.5° C. per minute. Dyeing is carried out at this temperature for 60 minutes, the bath is then cooled to 50° C. and the dye liquor is drained off. The woollen fabric, which has been dyed in an orange colour shade, is rinsed and dried in the customary manner.

Dyeing Example 2

100 Parts of a woollen fabric are pretreated for 5 minutes at a temperature of 30° C. and a pH of 4.5 in an aqueous bath which comprises 2000 parts of water, 5 parts of sodium sulfate, 2 parts of sodium acetate and 2 parts of 80% acetic acid. After addition of an aqueous solution comprising 0.9 part of the dye of the formula (102) and 2 parts of the fixing agent of the formula ##STR67## the dye liquor is kept at a temperature of 30° C. for a further 5 minutes and then heated to a temperature of 100° C. at a heating-up rate of 1.5° C. per minute. Dyeing is carried out at this temperature for 40 minutes, 15 parts of disodium hydrogen phosphate are added and dyeing is continued at a pH of 7 for a further 40 minutes. The bath is then cooled to 50° C. and the dye liquor is drained off. The woollen fabric, which has been dyed in an orange colour shade, is rinsed and dried. The resulting dyeing is level and has very good wet fastness properties. 

What is claimed is:
 1. An anionic acid dye of the formula ##STR68## in which R₁ is hydrogen or C₁ -C₄ alkyl which is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl, R₂ is C₁ -C₄ alkyl,X₁ is C₁ -C₈ alkyl, C₅ -C₇ cycloalkyl which is unsubstituted or substituted by C₁ -C₄ alkyl, or phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen or carboxyl, or naphthyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl or sulfo, or the radical of the formula --N(R₂)--X₁ is a ring, which may contain further heteroatoms, Y₁ is a radical of the formula ##STR69## in which B₁ is C₁ -C₁₂ alkylene which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and --O-- and is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl, or C₅ -C₇ cycloalkylene which is unsubstituted or substituted by C₁ -C₄ alkyl, phenylene, or naphthylene which are unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ C₄ alkanoylamino, amino, hydroxyl, ureido, halogen, carboxyl or sulfo, R₃ is hydrogen or C₁ -C₄ alkyl and R₄ is hydrogen or C₁ -C₄ alkyl which is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl, W₁ is hydrogen or a radical of the formula --CO--R, in which R is C₁ -C₈ alkyl, or phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo and A₁ is the radical of a monoazo dye of the formula ##STR70## in which K₁ is a radical of the benzene or naphthalene series or a heterocyclic radical and (R₅)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl and sulfo, or A₁ is the radical of a polyazo, metal complex azo, anthraquinone, formazan, phthalocyanine or dioxazine dye.
 2. An anionic acid dye according to claim 1, whereinR₁ is hydrogen or C₁ -C₄ alkyl.
 3. An anionic acid dye according to claim 1, whereinX₁ is phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ -alkanoylamino, ureido, halogen or carboxyl.
 4. An anionic acid dye according to claim 1, whereinB₁ is a C₁ -C₁₀ alkylene radical which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and --O-- and is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl.
 5. An anionic acid dye according to claim 1, whereinR₄ is hydrogen or C₁ -C₄ alkyl.
 6. An anionic acid dye according to claim 1, whereinW₁ is hydrogen.
 7. An anionic acid dye according to claim 1, whereinR₁, R₃ and R₄ independently of one another are hydrogen or C₁ -C₄ alkyl, R₂ is C₁ -C₄ alkyl, X₁ is phenyl which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl or sulfo, B₁ is a C₁ -C₁₀ alkylene radical, which can be interrupted by 1, 2 or 3 members from the group consisting of --NH--, --N(CH₃)-- and --O-- and is unsubstituted or substituted by hydroxyl, sulfo, sulfato, cyano or carboxyl and W₁ is hydrogen.
 8. An anionic acid dye according to claim 1, whereinA₁ is a radical of the formula (3) or the radical of a disazo or anthraquinone dye.
 9. An anionic acid dye according to claim 1, whereinA₁ is a radical of the formula (3) or a radical of the formula ##STR71## in which (R₁₁)₀₋₃ and (R₁₂)₀₋₃ independently of one another are 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, cyano, carbamoyl, carboxyl, sulfo, amino and N-mono- or N,N-di-C₁ -C₄ alkylamino, and K₂ is a radical of the benzene or naphthalene series or a heterocyclic radical, or A₁ is a radical of the formula ##STR72## in which G is a phenylene radical which is unsubstituted or substituted by C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl or sulfo, or a cyclohexylene, phenylenemethylene or C₂ -C₆ alkylene radical.
 10. An anionic acid dye according to claim 1, whereinA₁ is a radical of the formula ##STR73## in which (R₅)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen and sulfo, (R₁₁)₀₋₃ and (R₁₂)₀₋₃ independently of one another are 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, halogen, hydroxyl, cyano, carbamoyl, carboxyl, sulfo, amino and N-mono- or N,N-di-C₁ -C₄ alkylamino, (R₁₃)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, halogen, carboxyl and sulfo, and K₁ and K₂ independently of one another are a radical of the formula ##STR74## in which R₆ is methyl or carboxyl, R₇ is amino or hydroxyl and (R₈)₀₋₃ is 0 to 3 identical or different substituents chosen from the group consisting of C₁ -C₄ alkyl, C₁ -C₄ alkoxy, C₂ -C₄ alkanoylamino, ureido, halogen, carboxyl and sulfo, or a radical of the formula ##STR75## in which R₉ is hydrogen, amino or N-mono- or N,N-di-C₁ -C₄ alkylamino and R₁₀ is hydrogen or hydroxyl.
 11. A process for the preparation of an anionic acid dye of formula (1) according to claim 1, which comprises reacting a cyanuric halide with a compound of the formula

    A.sub.1 --NHR.sub.1                                        ( 13),

a compound of the formula

    X.sub.1 --NHR.sub.2                                        ( 14)

and a compound of the formula

    Y.sub.1 --H                                                (15)

and optionally subsequently carrying out a conversion reaction, where A₁, X₁, Y₁, R₁ and R₂ are as defined in claim
 1. 12. A process for dyeing or printing hydroxyl group-containing or nitrogen group-containing fibre material, which process comprises applying to said fibre material a tinctorial amount of an anionic acid dye according to claim
 1. 13. A process according to claim 12, wherein said fibre material is natural or synthetic polyamide fibre material. 